How to refer CompliancRule in IT Shop Approval workflow mail templates

We have a requirement to do Compliance Rule check in IT Shop Approval Workflows and notify approvers with detected compliance rule violation details, in case there is a Compliance Violation.

We used "CR - Compliance check simplified" approval procedure for compliance check and it is working fine. 

However, we are struggling to include Compliance Rule details in corresponding mail templates.

We are trying to do it using mail template referencing PWOHelperPWO as base object where I can see there is a column called UID_ComplianceRule but noticed that it is empty for all of the records in PWOHelperPWO table.

Even for the records where Compliance Detected.

It would be great if someone can advise workaround or better approach to achieve this requirement.